91Ó°ÊÓ

The correct sequence of decrease in the bond angle of following hydrides is (a) \(\mathrm{NH}_{3}>\mathrm{PH}_{3}>\mathrm{AsH}_{3}>\mathrm{SbH}_{3}\) (b) \(\mathrm{NH}_{3}>\mathrm{AsH}_{3}>\mathrm{PH}_{3}>\mathrm{SbH}_{3}\) (c) \(\mathrm{SbH}_{3}>\mathrm{AsH}_{3}>\mathrm{PH}_{3}>\mathrm{NH}_{3}\) (d) \(\mathrm{PH}_{3}>\mathrm{NH}_{3}>\mathrm{AsH}_{3}>\mathrm{SbH}_{3}\)

The crystals of ferrous sulphate on heating give (a) \(\mathrm{FeO}+\mathrm{SO}_{2}+\mathrm{H}_{2} \mathrm{O}\) (b) \(\mathrm{FeO}+\mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{H}_{2} \mathrm{O}\) (c) \(\mathrm{Fe}_{2} \mathrm{O}_{3}+\mathrm{SO}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{H}_{2} \mathrm{O}\) (d) \(\mathrm{Fe}_{2} \mathrm{O}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{H}_{2} \mathrm{O}\)

Ammonia can be dried by (d) Anhydrous \(\mathrm{CaCl}_{2}\) (a) Conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) (b) \(\mathrm{P}_{4} \mathrm{O}_{10}\) (c) \(\mathrm{CaO}\)

The element that has the least tendency to show the inert-pair effect is (a) Bi (b) \(\bar{P}\) (c) \(\mathrm{Sb}\) (d) \(\mathrm{N}\)

When potassium ferrocyanide crystals are heated with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\), the gas evolved is (a) \(\mathrm{SO}_{2}\) (b) \(\mathrm{NH}_{3}\) (c) \(\mathrm{CO}_{2}\) (d) \(\mathrm{CO}\)

Which of the following does not have \(\mathrm{S}-\mathrm{S}\) linkage? (a) \(\mathrm{S}_{2} \mathrm{O}_{8}^{2-}\) (b) \(\mathrm{S}_{2} \mathrm{O}_{6}^{2-}\) (c) \(\mathrm{S}_{2} \mathrm{O}_{5}^{2-}\) (d) \(\mathrm{S}_{2} \mathrm{O}_{3}^{2-}\)

On passing \(\mathrm{H}_{2} \mathrm{~S}\) through acidified \(\mathrm{FeCl}_{3}\) solution, \(\mathrm{FeCl}_{3}\) is converted into (a) \(\mathrm{FeCl}_{2}\) (b) \(\mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}\) (c) \(\mathrm{Fe} \mathrm{S}\) (d) \(\mathrm{FeSO}_{4}\)

Caro's acid is (d) \(\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{8}\) (a) \(\mathrm{H}_{2} \mathrm{SO}_{5}\) (b) \(\mathrm{H}_{2} \mathrm{SO}_{3}\) (c) \(\mathrm{H}_{3} \mathrm{~S}_{2} \mathrm{O}_{5}\)

The basic character of the hydrides of \(\mathrm{V}\) group elements decreases in the order (a) \(\mathrm{NH}_{3}>\mathrm{PH}_{3}>\mathrm{AsH}_{3}>\mathrm{SbH}_{3}\) (b) \(\mathrm{SbH}_{3}>\mathrm{AsH}_{3}>\mathrm{PH}_{3}>\mathrm{NH}_{3}\) (c) \(\mathrm{NH}_{3}>\mathrm{SbH}_{3}>\mathrm{PH}_{3}>\mathrm{AsH}_{3}\) (d) \(\mathrm{SbH}_{3}>\mathrm{PH}_{3}>\mathrm{AsH}_{3}>\mathrm{NH}_{3}\)

The number of \(\mathrm{P}-\mathrm{O}\) - \(\mathrm{P}\) bonds in cyclic metaphosphoric acid is (a) Zero (b) Two (c) Three (d) Four